多组分介质低温相平衡的理论研究现状

The advance in theory research of phase equilibrium for multicomponent medium at cryogenic temperature range

多元混合工质的相平衡特性是复杂且重要的问题之一。文中综述了国内外多组分介质相平衡的理论研究现状,包括状态方程和混合规则的改进、活度系数模型的研究以及对特定体系计算方法的研究等。并总结了适用于低温下尤其是针对天然气组分的相平衡计算方法。

The characteristic for phase equilibrium of muhicomponent mixtures is one of the most complicated and important problem. This paper surveyed the theory research developments of phase equilibrium for multicomponent medium, including improvements of equations of state and mixing rules, studies of active coefficient models and calculation methods for some particular systems, etc. , and further summarized the calculation methods of phase equilibrium at cryogenic temperature range, especially for components of natural gas.